Four problems related to steering have been reported for the 1998 GMC Yukon. The most recently reported issues are listed below.
The power steering goes into "full mode" at speeds above about 25 mph, making a one inch movement of the steering wheel into the equivalent of a one quarter turn of the wheel. It is especially dangerous on the freeway, although on city streets it makes the vehicle jerk around in the lane. This has already been reported and has resulted in one death and about 8-10 accidents. My wife and children will not drive the vehicle due to this condition, and I have had several "close calls" due to this faulty GMC part, which has a technical service bulletin already published about it.
Consumer complained about a steering problem. There was a lost of motion in the steering wheel and it was loose. The vehicle was very unstable when driving at high speeds. The vehicle would veer into oncoming lanes and or in traffic with no warning.
Vehicle has the same problem as stated in NHTSA recall NHTSA 97v142000. Vehicle description: light duty extended-cab pickup trucks and 4-door utility trucks. The lower steering shaft to steering gear pinch bolt is "finger loose" or missing allowing the bolt to loosen and fall out. The steering shaft yoke can wear, causing an off center steering wheel.
The steering over compensates at speeds of 20+. Please refer to ea99-011, as it is consistent with that document.